The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus)

The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus) contains about 170.000 records from 1974 to 2003 and collects publications of different document types: books, dissertations and other university publications, articles from journals and newspapers including reviews, maps etc. The lists of personal and geographical subjects are located here and here.

Your search for Immele, Fritz provides 2 hits
1	In Moskau und Leningrad (Čto ja videl v Moskve i Leningrade) Immele, Fritz, Moskau: APN 1984, 108 S.
2	Reise in die USA und in die UdSSR (Putešestvie v SŠA i SSSR) Immele, Fritz Michael, Moskau: APN 1987, 63 S.

The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus)

In Moskau und Leningrad (Čto ja videl v Moskve i Leningrade)

Reise in die USA und in die UdSSR (Putešestvie v SŠA i SSSR)